PHP如何删除两个重复的关联数组，如果发现

Question

我有这些行

$rows = [
['user' => 1, 'access' => '342'],
['user' => 2, 'access' => '765'],
['user' => 3, 'access' => '134'],
['user' => 1, 'access' => '342']
];

i manage remove duplicate例如:user = 1，

$ids = [];
foreach ($rows as $k => $item) {
if (in_array($item['user'], $ids)){
unset($rows[$k]);            
} else {
$ids[] = $item['user'];
}    
}
echo json_encode($rows);

问题是，我希望最终结果完全删除两个副本。例如:期望输出(不再有用户1)

[
{"user":2,"access":"765"},
{"user":3,"access":"134"}
]

谢谢

Answer 1

$rows = [
['user' => 1, 'access' => '342'],
['user' => 2, 'access' => '765'],
['user' => 3, 'access' => '134'],
['user' => 1, 'access' => '342']
];
$res = [];
foreach ($rows as $row) {
if(!empty($res[$row['user']])) {
unset($res[$row['user']]);
} else {
$res[$row['user']] = $row;
}
}
print_r(array_values($res));